Host Bridges (EHB) by IDT play a critical system role acting as a hub between the host processor, the system memory, and the system input/output (I/O). The host processor and the system I/O both use the host bridge to access common system memory. In addition, the system controller and host processor use the host bridge to configure and manage system I/O .
IDT offers host bridges that service high-end discrete processors as well as bridges that are optimized for embedded integrated controllers.
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The PowerSpan II is a multi-port PCI bus switch that bridges PCI to the PowerQUICC? II (MPC8260), MPC7xx, PowerPC? 7xx, and PMC-Sierra WinPath? processors. The bridge defines a new level of PCI bus switch flexibility.
The PowerSpan II has a switched PCI architecture, which maximizes transfer concurrency and improves the efficiency and burst performance on the PCI and processor buses. Along with a revolutionary switched PCI architecture, the PowerSpan II features integrated PCI-to-PCI bridging, concurrent prefetch read capability, multi-port Direct Memory Access (DMA) operation, and CompactPCI Hot Swap support.The PowerSpan II is available in single or dual PCI variants. The single PCI PowerSpan II is a two-port device that has a PCI interface and a PowerPC bus interface. The dual PCI variant is a three-port device that has two PCI interfaces and a PowerPC bus interface.
The PowerSpan II in conjunction with the PowerPro – a PowerPC memory controller – provides a 100-MHz PowerPC interconnect solution. This flexible offering allows designers to leverage the PowerSpan II and PowerPro devices across many different system architectures with a common investment in software.
The QSpan II is an industry-proven, Freescale? Semiconductor processor-to-PCI system interconnect device. The QSpan II enables board designers to bring PCI-based embedded products to market faster, for less cost, and with high performance.
The QSpan II is designed to gluelessly bridge the Freescale PowerQUICC? and QUICC? (MC68360) processors to the PCI bus. The QSpan II is backward compatible with the QSpan 1.2.